agentmods.dev

SessionStart

A session-start hook that runs bootstrap.sh when an agent session begins. A hook is an automatic action tied to a lifecycle event, and a shell script is a file containing command-line instructions.

In plain words
What is it for?
It is for executing bootstrap.sh at the beginning of a session. The input does not provide enough information to describe the script’s specific work.
Why use it?
It removes the need to remember or manually run the startup commands required by the project. The input does not say what bootstrap.sh sets up.

Hook

2 1mo ago A scan tokens not measured AGPL-3.0
View the source file trouties/bashback
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add hooks/trouties/bashback/session-start
Clone the repo
git clone --depth 1 https://github.com/trouties/bashback
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Security

Grade A, and why

SessionStart scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the commands this hook runs, not an audit. A hook is shell that executes on your machine at the event it names, which is why every command in it is printed with what was found.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

hooks/hooks.json · 18 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 18 lines scan A 4e09eaeca1ff

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository trouties/bashback (2 stars, last pushed 1mo ago), licensed AGPL-3.0. Its token cost is not measured: a hook is shell that never enters the context. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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Related

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PostToolUse

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UserPromptSubmit

Runs when you submit a prompt, before the agent sees it, running an inline shell check. From provasign/prism.

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craigjmidwinter/katra · not measured

PostToolUse

Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.

supabase/supabase · not measured

SessionStart

Runs when a session starts on startup, executing install_pkgs.sh. From supabase/supabase.

supabase/supabase · not measured